James h



(No Model.)

' --J H. .BLESSINQ- STOP 000K,

Illlllllllii Patented May 6, 1884.

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vUNITED STATES PATENT EEICEo JAMES E. BLEssINe, oF ALBANY, NEW YORK.`

vSTOP-COCK.

SPECIFICATION forming part of Letters Patent No. 298,062, dated May 6, 1884. y

Application filed lDecember 18, 1883. (No model.)

To @ZZ whom it may concern.:

Be it known that I, JAMES H. BLEssING,

of the city and county of Albany, in the State of New York, have invented certain new and useful Improvements in Stop-Cocks, of which the following is a specification.

My invention consists in providing stopcocks and other similar appliances with turnplugs having removable and renewable seg- Io mental sections or gibs, that are adapted to form tight joints with the bore of the casing or shell of the cock; and the object of my improvements is to afford ready, effective, and

inexpensive means for remedying a leakage I5 of the cock without removing the cock from its place in a line lof pipe. This object I attain by means of the construction illustrated in the accompanying drawings, which form part of this specification, and in Whichs 2o Figure 1 is a side elevation of a cock containing Iny improvements; Fig.` 2, a longitudinal section of the same; Fig. 3, a horizontal section of the saine, showing the plug turned to close the openings; Fig. 4, a like section with the plug turned to open the passages through the cock, and Fig. 5 a side elevation of the skeleton cage ofthe turn-plug.

As illustrated in the drawings, A is the casing or shell for the cock, made in cylindrical form, and provided with lateral branches, a, for receiving the connectingpipes. The lower end of said casing is made closed, and the upper en d-made open-is closed by means of a cap, B, that is screwed thereinto. Said cap has a central hole formed therein for the stem of the turn-plug, and is provided with a stufingbox, b, for forming a tight joint around said stem. The turnplug consists of a skeleton cage composed of two circular disks, C,

- 4o arranged one above the other, and connected together by means of vertical bars c, so as to form two passages, which cross each other at right angles. Extending upward from the center of the uppermostone of the disks C there is a hollow stem, c', which contains an upper chamber, c2, a screw-threaded portion, c3, and

a lower chamber, c4, for the purposes hereinafter explained. The stem c passes through the stuffing-box b, and has on its outer end a 5o handle or lever, C', by which the turnplug is operated. Segmental gibs D are loosely fitted into two 'ofthe oppositely-located pas# sages formed between the vertical bars c, and have their convex surfaces closely fitted-#by grinding or `other means-to the bore of'l the 55 casing A, so as to forma tight joint therewith. A'spring, E, Iixed in the chamber c, exerts its pressure against the uppermost one of a pair of angle-iralnes, F, which are arranged in reversed .positions between the gibs D, so as to 6o press the said gibs outward and keep them in close contact with the bore of the casing A. For the purpose of grinding in the turn-plug, (wherever this operation is required,) a screw,

G, is iitted into the threaded portion c3 of the 65 stem, and is so arranged that it can be screwed down to bear, with any required degree of pressure, uponthe uppermost one of the angle-frames F, and rigidly hold the gibs D during the operation of grinding. The head 7o of the screw G is contained in the upper chamber,c2, and is provided with a slot or other means for receiving a driver or other tool for turning said screw when occasion requires. vA screw-plug, H, inserted in the upper end of 7'5 the hollow stem c', is providedwith' a flange,

h, which overlaps onto the eye of the handle C', and secures the latter in place'on the stem of the turn-plug. 1

It is manifest that in this form of cock the 8o greatest wear willv come upon the segmental gibs D, which, being removable from the turns plug, canbe readily renewed at a very slight cost. v f

I claim as my invention- .1. The combination, with a casing, A, provided with branches c, of a turn-plug consisting of a skeleton cage provided with expansble gibs D, angle-frames F, and a spring,

E, substantially as and for the purpose herein 9o specified.

2. The combination, with av casing, A, for a stop-cock, of aturn-plug consisting of a skele, ton cage provided with expansible gibs D, mechanism for forcing said gibs outward, and 9 5 a set-screw, G, as and for the purpose herein specified. if

3. In a stop-cock, the combination, with a turn-plug consisting of. a skeleton cage provided with a hollow stem, substantially as deloc .I AMES H. BLESSING.

Witnesses: A

WILLIAM H. LOW,

S..B. BREWER. 

